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Fingerprint identification method and fingerprint identification system

A fingerprint identification and fingerprint image technology, applied in the field of biometrics, can solve problems such as inconsistent DC components, Gabor filters that cannot meet the best spatial positioning, and bandwidth that cannot be constructed, and achieve the effect of reducing the amount of calculation

Inactive Publication Date: 2016-07-06
BYD CO LTD
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  • Claims
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Problems solved by technology

However, Gabor filters also have inherent flaws
For an even symmetric Gabor filter, it is impossible to construct a transfer function with an arbitrary bandwidth and no DC component
The Gabor filter cannot meet the requirements of obtaining the widest possible spectrum information while obtaining the best spatial positioning.

Method used

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  • Fingerprint identification method and fingerprint identification system
  • Fingerprint identification method and fingerprint identification system
  • Fingerprint identification method and fingerprint identification system

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Embodiment Construction

[0068] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0069] In the description of the present invention, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly defined in this embodiment.

[0070...

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Abstract

The invention discloses a fingerprint identification method. The fingerprint identification method comprises steps that a fingerprint image is segmented and filtered, the pre-processing steps comprise a segmentation sub step and a filtering sub step, for the segmentation sub step, the Harris corner energy of each pixel of the fingerprint image is calculated, the Harris corner energy smaller than a preset threshold is filtered to acquire a binary graph, and expansion and corrosion processing on the binary graph is carried out; for the filtering sub step, the direction field, the frequency field and the curvature field of the binary graph are respectively calculated, and a Log-Gabor filter is utilized to filter the processed binary graph. Through the method, computational complexity is reduced through the fingerprint method. The invention further provides a fingerprint identification system.

Description

technical field [0001] The invention relates to biological identification technology, in particular to a fingerprint identification method and a fingerprint identification system. Background technique [0002] Fingerprint recognition technology occupies an important dominant position in the field of biometrics, because fingerprints have the characteristics of uniqueness, stability, reliability, easy collection and low cost. Therefore, automatic fingerprint recognition technology is one of the most widely used identity authentication technologies so far, but there are also many key problems to be further solved. To solve the difficulties faced by fingerprint identification, it is necessary to start from two aspects of preprocessing and matching: (1) how to enhance the quality of the fingerprint image collected by the fingerprint acquisition device; and (2) how to choose an effective identification algorithm to solve The contradiction between the accuracy of fingerprint recog...

Claims

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Application Information

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IPC IPC(8): G06K9/00
Inventor 姜波黄忠伟隋歆钰
Owner BYD CO LTD
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